Catalogue

UNT-PRC001-EN 41
Controls
The adapter allows direct customer interfacing through the use of terminal strips. Standard
interfacing includes:
• Fan Speeds (H, M, L) (for wall mounted fan speed switches)
• Variable speed (0–10V) inputs
The standard adapter board eliminates many separate
wiring harnesses in the panel and allows
simple, mistake-proofed single-plug interfacing of:
• The ECM engine controller
•Transformers
•Motors
• Valves
•Dampers
• Electric heat control
• Fan speed switches
• Main power (except electric heat)
The manual fan mode switch is available for fan-coil units that do not have Trane factory-mounted
control packages. This four-position switch (off, high, medium, low) allows manual fan mode
selection and is available unit or wall mounted. The unit-mounted option (Digit 31 = D) operates
on line voltage. The wall-mounted option (Digit 31 = K) is low-voltage and has three 24-volt relays
using a factory-wired transformer and relays to control the fan motor.
Customer Supplied Terminal Interface (CSTI)
Figure 6. CSTI adapter board
Customer Low-Voltage Interface for
Valves, Electric Heat, Dampers, Fan
Speeds, Variable Fan Speed, and
24 Vac Supply
Valve(s), Electric Heat, and Changeover
Configuration Switches (Factory-Set)
UNT-PRC001-EN.book Page 41 Tuesday, May 8, 2012 10:54 AM